<?php
/**
 * 中介者模式----设计模式
 * Created by Jason.
 * User: Administrator
 * Date: 2019/12/7 0007
 * Time: 下午 5:38
 */

namespace app\index\service;


use app\index\abstracts\Colleague;

class DataBase extends Colleague
{
    public function getData(): string
    {
        return 'World';
    }

}